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Finding the Fourth Proportional to 15,776.48, 21,773.07 and 11,790.68

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Solution

The fourth proportional to 15,776.48, 21,773.07 and 11,790.68 is: 16,272.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,776.48 : 21,773.07 = 11,790.68 : x
  2. Step 2: Convert to fraction form
    15,776.48/21,773.07 = 11,790.68/x
  3. Step 3: Cross multiply
    15,776.48x = 21,773.07 × 11,790.68
  4. Step 4: Simplify right side
    15,776.48x = 256,719,192.12
  5. Step 5: Solve for x
    x = 256,719,192.12/15,776.48
  6. Step 6: Final answer
    x = 16,272.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.